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May 3 1933. c. I... HERROD VACUUM ELECTRIC THROTTLE 3 Sheets-Sheet lchance-bum.

Filed y 31, 1929 Inventor By g I p 7 g2 I ltor ney May 30, 1933. c. L.HERROD VACUUM ELECTRIC THROTTLE Filed May 31, 1929 3 Sheets-Sheet 2ap/(11%: QQWLHWA nmhkk May 30, 1933. c. L. HERROD VACUUM ELECTRICTHROTTLE Filed May 51, 1929 s Sheets-Sheet 5 Patented May 39, 1933 PTENT oF-mcs eminence L. Hneaonor House-01v, ivrissrssrrr vacuumrinncrs'lrc 'rrrnorrrnn Application filed May a1, 1929. serial No.aergsssf My present invention has reference to vacuum electric throttleas an attachment to gasoline motors, for the controlof the motors speedat a station distanced from the motor.

The primary object is to provide an attach nient easily associated Witha gasoline motor and adapted to function therewith in conj-unction'withthe vacuum created in the intake manifold of the motor, whereby the mthrottle of the motor is controlled by elec trical circuits operated inharmonious con-' the control exercised to he by the same human agency asgoverningthe progress of the saw carriage. 7

Various other uses and advantages of the invention will be in part moreobvious froman inspection of the accompanying drawings, and will be inpart more fully set forth in the following particular description of oneform of the device embodying the invention.

In the drawings:

Figure 1 is a rear view of the invention. Figure 2is a front viewthereof, Figure 3 is a cross-sectional view of same.

Figure 4 is a cross sectional view of the needle valve control."

Figure 5 is a rear perspective-view of the throttle arm, disposed toextending through the lateral sleeve in the lower portion of thehousing. I

Figure 6 is a perspective view of the control switch. V I

Figure 7 isa'n end cross sectional view of the cylinder 2 and component"attachments.

Referring now to the drawings in detail;

the numeral 1 designates the housing which is bolted tothe intakemanifold'of a gasoline motor, the side next the manifold being thatshownin Figure I; this attachment is completed by passing boltsthru'eyelets 1a and lb in thehousing, and bolti-ng'tothe'manrfo1d, theduct 1c in the housingbei-ng inex tended relation to the intake manifoldduct; on completion of the attachment. I

The ductlcleads from the intake ma'niw fold to the vacuum chamber 19formed in thehousing 1 q Cylinders 2 and 2 arexd isposed opposite; eachother at either side of the housing 1. Cylinder 21 passes thru thechamber 19 connecting thereby the cylinders 2' and 2 with the chamber.;I v

A duct 23a is disposed in the top of thecylinder 21, and is adapted toretain the lower end ofthe rod 18- which extends thruthe chamber-19 andone side of the housing 1; to the exterior thereof as disclosed inFigure 3. The rod 18at its outer extremity is pre vided with a tripfinger 8;" and extending;

from the finger Well within the block the rod is turned to make a tightfitbetween rod m and housing wall. The opening 17 inthe housing 1 thruwhich the rodfl18 'pa sses is of one dimension,- but the rod is turneddownalong its innerextension with the housing I thus providing anopenchamber connecting with theva'cuum chamber 19'', thus the rod 18'has a certain pull inward exerted on it at all times by the-vacuiirnmaintained in the chamber 19.

Oppositely disposed tothe duct 17 is a ductil7 leading from the-oppc'ysi-te' side of the housing to the chamber -19. Mounted by supportelements 4a and 4a across the top of the housing I is a-tri p-rod V 4Witha semi-fiexi-ble-j'oint 4c. Viewing the device, as illu-stratedinFig ure 3, the rod 4% passes thru asleeve-eyeletin the ofthe valve trip4b. The oppositeextremity of the rod 4 is" U-shape'd, the lower end ofwhich is adapted'toclose the" mouth ofv the duct 17. i The cylinders 2and2 are open at either endhaving disposed in each the pistons '20 and20 on piston-rods 2b -2b oonnectedto' the heads 2a and 2a. Ducts-Q'dand2d ex} tend from the ends of the pistons 20520" to the inner side ofeach of the rods 26 and v 2?). Affixed the piston heads 2a and 2a" areflexible arms 2m and am", atthe free ends I of each of said arms are theneedle val ve' points 210 and 21!) adapted to close the mouths of theducts 2 Z2(Z,

Viewing the device as illustrated in Figure 2, the cylinders 2-2 areprovided with corresponding parallel guide slots which extend from therespective outer ends of the cylinders 22 to about three-fourths thelength of the respective cylinders, and in which move the guide posts 13and 14 attachedthe heads 2a2a. The posts 13 and 14 are connectcd by arod 12, this rod has at its center a pin 12a extending laterally theretoand adapted to engage with a lever rod 15.

A pin 16 fitted within a laterally disposed sleeve 1d in the housing 1extends from the front tothe rear of the housing through the sleeve 1d,the rear extremity of this pin having disposed therein a slot 156adapted to.

connect with the motor throttle proper. Ex-

tending at a right. angle to-the pin 16 andconnected with the frontextremity. of the pin is the arm l5'provided with a U-shaped sleevejoint in which the pin 12a is adapted to freely move.

Anadjustable stop 11 is provided on the supporting the coils 33independently ofthe housing 1. v At the outer extremity'of each coil isappended aspring blade .55 with adjusting screws 66 comprising contactelements at the free ends of the blades. The elements 6-6 are inalignmentwith the corresponding points 22-22 on the respective pistonheads 2a and 2a..

Opposite'lydisposed to the coils 3-3 are the contact points 7 and 8 onthe rod 4. Cable Y extends fromcoil 3-to blade 5 and cable X extendsfromthe coil 3 to theblade 5. The cable Z extends from coil 3 to thecontrol switch 26 and cable .2 extends fromcoil 3, to a second contactpoint of the control switch, Battery B is grounded by cable C flto thehousing 1 and the cable W .extends from the battery to a connection withthe control switch 26, as illustrated in F igure 6. c i V r The controlswitch 26 is preferably located on the control stick of the sawmill. Theswitch 26 comprises a base proper 26 and lever handle-27 suspended inrelation to the base by hinge 31. The handle 27 is normally maintained.in a predetermined'relation to the contact control posts 28, and 30 bythe spring 29. I 1

The needle valve 21 connecting the cylinder 2 and 2 with the vacuumchamber 19 is illustrated in cross-section in Figure 4 of the drawings.This valve 21 is comprised of a casing proper at either end of which arethe nipples 2222. Normally disposed within the casing 21 and between thenipples 2222 isthe valve proper 23-24-25. A duct 23a leads from thevacuum chamber 19 to the interior of the sleeve valve 23. Disposedwithin the sleeve valve 23 is a compression spring 25, and between thebase of the valve 23 and the needle 24, this spring adapted to normallyretain the needle 24 pressed against the mouth of the valve 23. Ductslead from the inner chambers of the cylinders 2-2 through the'nipples22-22, respectively, to the base of the valve 23 and needle head 24.

In the operation of the above described device, the switch control isattached to the saw lever, andis held in the hand of the sawer. Thepoints 28 and 30 are insulated from the base 26. The spring 29 normallymaintains the contact circuit through the point 30.

To break this contact and make a circuit through the point -28"the leverhandle 27 is pressed inward by a squeeze of the hand; this last contactmakes a circuit thru coil 3 to ground 6. The finger 8'is pulled outwardby the magnetic circuit thru the coil 3 which opens the throttle; andsimultaneously with the opening of the throttle the ground is broken at6. which breaks the current of'electricity. hen the handle 27 isreleased, the contact with the point 28 would be broken and contact withthe point 30 would be made which would make an electrical. circuit thruthe coil 3 with the ground at the point 6; an electrical circuit thrucoil 3 draws the trip-rod 4 to-the left and there by raising the valvetrip 4?), permitting the rod 8 to be drawn in by the vacuum thru 17. Asexplained, the coils 3 and 3 act as magnets, so that when electricalcurrents are alternately passed thru them, the respective points 7' and8 are alternately controlled.

In the operation of the valve 21, themember 23'I1ormally closes the ductthru 22 in to, the cylinder2 and correspondingly the member 24 does notclose-the duct thru 22. The vacuum thru member 21 and duct 22 into thepiston 2 draws down the needlein the valve seat of the duct 2d andcorrespondingly the piston 20 is drawn inward by the vacuum. r

. The pistons 20 and 20' being tied'by the rod 12, the piston 20 ismoved to the left, or outwardly, and correspondingly is the asso--ciatedvarm 15 andmember 16, to which is attached the motor throttle,moved leftward.

To open the valve seat closed. by the member 23, and close that valvenow left open by themember 24, the finger Sis pulled outwardly bymagnetizing the coil 3, and the rod 18 thus shifts the valve 3' illcorresponding movement, which movement tion motor, a housing, a Vacuumchamber of the elements creates vacuum within the cylinder 2 drawing thepiston 20 inwardly, and correspondingly moving the piston 20' outwardly.This last described movement of the associated elements opens thethrottle of the motor.

To hold the rod 18 in the last described position the trip 46 supportedby the rod 4, is provided. This trip is adapted to drop in front of thefinger S and thereby hold the rod outwardly, until the trip 4?) ispulled upward by the movement of the rod 4; to the left by magnetizingthe coil 3.

lVhen the finger 8 is released by the trip 4?; it is pulled inward byvacuum thru 17, and at the same time the pistons 20 and 20 move to theleft in reverse manner to the action previously described, and therebythe throttle is closed.

Easy flexation in the movement of the bar 4 is permitted by the oint 4c.

lVhat I claim is:

1. In a device of the class described, a housing with a centrallydisposed vacuum chamber therein, laterally disposed ducts extending fromeither side of the housing to the vacuum chamber, pistons disposed insaid ducts and alternately responsive to magnetic influence, means tocontrol the magnetic influence exerted on the pistons, and oppositelydisposed pistons within the oppositely disposed cylinders on either sideof the housing, the movement of the latter pistons responsive to thevacuum influence exercised through intermediary conductive means.

2. In a device of the class described, a housing with a centrallydisposed vacuum chamber therein having a connection for an intakemanifold, and laterally disposed within the chamber a vacuum conductivemeans adapted to control the influence of vacuum within the chambers ofthe oppositely disposed cylinders, and an associated means with theconductive means responsive to alternately exercise a magneticinfluence.

8. In a device of the class described, a housing with a centrallydisposed vacuLun chamber therein, and connecting with an intake manifoldoppositely disposed cylinders at either side of the housing, saidcylinders connected with the vacuum chamber in the housing by alaterally disposed conduit element, and disposed within the conduitelement a control means responsive to vacuum influence exerted throughthe cylinders, and associated means with the control means responsive toindependent magnetic influence, and pistons disposed within thecylinders responsive to the vacuum influence within the cylinders, saidpistons adapted to control the movement of a throttle rod extending to amotor.

disposed in said housing, associated means to set up a vacuum within thechamber, oppositely disposed cylinders at either side of the housing,said. cylinders connected with the vacuum chamber in the housing by alaterally disposed conduit element, disposed within the conduit acontrol element adapted to control the influence of vacuum through theoppositely disposed cylinders, a control means associated with saidcontrol element, said control means responsive to independentlycontrolled magnetic influence and pistons disposed within the cylindersresponslve to the vacuum influence within the cylinders, said pistons inmovement adapted through intermediary means to control the position of athrottle rod extending to a motor.

In testimony whereof I hereunto affix my signature.

CLARENCE L. HERROD.

4. For connection to an internal combus-

